they take some responsibility. >> reporter: but ryan fired back. he slammed the obama administration's economic record. >> this is not what a real recovery looks like. we need real reforms for real recovery and that's exactly what mitt romney and i are proposing. >> reporter: after several heated exchanges, ryan insinuated that president obama's debate performance last week was motivating the vice president. >> i know you're under a lot of duress to make up lost ground. >> reporter: as for who won, it depends on who you ask. instant polls taken right after the debate are mixed. in a cbs news poll of uncommitted voters, 50% thought the vice president won. 31% sided for ryan and 19% called it a tie. 56% thought biden would be an effective president if necessary compared with 4 -9d -- with 49% for ryan. not surprisingly both sides claimed victory. mitt romney's campaign said biden seemed off balance and strange. the president's team said the debate exposed the risks of electing a romney-ryan ticket. the next presidential debate is tuesday. randall pinkston, cbs news, danville, kentucky.